I have no problem with someone shooting a person who has broken into their house.
But what you describe goes well beyond the definition of excessive. If you shoot someone in defense of yourself and your property, it needs to stop at the point where the threat has been eliminated. This guy basically “bounced the rubble”, and if the girl was still alive when that last shot was taken it goes from “self-defense” clear past “murder” and right into “execution”
He parked his truck several blocks away and turned off all of his lights, so anyone would think that he wasn't at home.
He hid downstairs in his basement, with a chair set up between two bookshelves, so he could lie in wait, out of sight of anyone who opened the basement door.
He stocked the space between the bookshelves with bottled water and powerbars so he could stay there for hours.
He purchased several tarps so he could wrap up the bodies.
He could not wait for his house to be broken into and went out of his way to present a tempting target.
Not one thing he did was in the heat of the moment.
It was all carefully planned out.
He claims that he waited more than a day to contact the police because he didn't want to bother them.
I think he was enjoying his trophies before he had to get rid of them.
there is no duty to retreat in your home.
there is no “be nice clause” for home intruders.